Looks like it is getting blocked somewhere as you thought. How come tcpdump output is seeing all the udp syslog-ng messages?

[root@aspsyslog ~]# /etc/init.d/syslog-ng start
Starting syslog-ng:                                        [  OK  ]
[root@aspsyslog ~]# /etc/init.d/syslog-ng stop
Stopping syslog-ng:                                        [  OK  ]
[root@aspsyslog ~]# nc -u -l 514

getting nothing...!



On Wed, Nov 17, 2010 at 5:34 PM, Patrick H. <syslogng@feystorm.net> wrote:
Ok, lets see if the problem is before it gets to syslog-ng or after. Shut syslog-ng down and do 'nc -u -l 514' and see if it gets anything. That'll dump out all traffic received. If it gets it, the problem is syslog-ng, if it doesnt get it the traffic is getting blocked somehow.

Sent: Wed Nov 17 2010 16:30:12 GMT-0700 (Mountain Standard Time)

From: keshava V <mv.keshava@gmail.com>
To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu>
Subject: Re: [syslog-ng] Syslog-ng not receiving messages
syslog-ng is using 514 as expected.

[root@aspsyslog ~]# netstat -upnl | grep ":514"
udp        0      0 0.0.0.0:514                 0.0.0.0:*                               8789/syslog-ng

Thanks


On Wed, Nov 17, 2010 at 5:27 PM, Patrick H. <syslogng@feystorm.net> wrote:
There isnt something already listening on udp 514 is there?
netstat -upnl | grep ":514"

Sent: Wed Nov 17 2010 16:23:44 GMT-0700 (Mountain Standard Time)
From: keshava V <mv.keshava@gmail.com>
To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu>
Subject: Re: [syslog-ng] Syslog-ng not receiving messages
Further,

I have tried setting the kernel parameters without any luck

[root@aspsyslog ~]# sysctl -w net.core.rmem_max=8388608
[root@aspsyslog ~]# sysctl -w net.core.rmem_default=1048576

[SNIP]

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Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.campin.net/syslog-ng/faq.html




______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.campin.net/syslog-ng/faq.html

______________________________________________________________________________
Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng
Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng
FAQ: http://www.campin.net/syslog-ng/faq.html